Elbow
Product description
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Main processing technology |
180 degree elbow-raw materials into the factory (re-inspection)→cut into blank→heating push molding→shaping→heat treatment→machining Bevel→surface treatment→finished product inspection→identification protection→into the inventory
(Note: there is a pickling passivation step for stainless steel products before surface treatment）
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Specifications model |
DN10-DN3000 90°and 45°long radius and short radius,and furnace pipe elbow accessories and other customized production according to customer standards |
| Material | Carbon steel, alloy steel,stainless steel,aluminum and other customized production according to customer standards |
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Standards |
National standard,American standard,German standard,Japanese standard and other customized production according to customer standards |
| Wall thickness | SCH5-STD-SCHXXS Other custom-made production according to customer standards |
| Color |
Black, yellow,blue,red and other customized production according to customer standards |
| Surface coating | Anti-rust oil; black; galvanized; polyethylene coating; epoxy coating and other customized production according to customer standards |
| Marking | Steel printing,spraying and other customized production according to customer standards |
| Certificate | ISO9001-2015 EU CE, etc. |
| Brands | Longsheng pipe fittings |
| Minimum purchase quantity | 1 piece |
| Payment terms | Wire transfer,acceptance,online banking remittance,cash, etc. |
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Main equipment and installation |
1: hydraulic push Machine 1, the maximum thrust 440t,the main push DN250 or more pipe fittings
2: screw mechanical push Machine 1, the maximum thrust of 160T,the main push DN200 below pipe fittings
3: 1 set of intermediate frequency heating equipment,250KW (hangkai), the maximum heating temperature of 1200℃
4: 1 set of intermediate frequency heating equipment, 160kW(hangkai), the maximum heating temperature of 1050℃
5: machining equipment: lathe d620-1 TX50 power head lathe:JT250 TX50 tx63a lathe 16k40 boring machine t6112 lathe CQ61100
6: heat treatment furnace (trolley type box type resistance furnace) RT9-80*1500*60 one, the maximum furnace temperature 1200℃
7: sandblasting machine 2 sets: mainly used for pipe surface rust
8: sensor (Homemade): for material heating 60 sets
9: push core head (Homemade): for molding guarantee 126 sets
10: air compressor:for heat treatment air cooling
11:machining fixture (special) 76 sets
12: 315t hydraulic press 1 (mainly used for elbow shaping）
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一、Acceptance of raw materials
1、Raw materials should meet the requirements of the relevant standards or technical specifications.
2, the surface of raw materials should be free of oil, too much rust corrosion and obvious dent defects,low melting point metal pollution.
3, inspection of raw materials quality certificate, furnace number,Lot number,specifications, manufacturers and implementation standards.
4, raw materials with wire brush for mechanical rust, so as to meet the requirements of nondestructive testing.
5, the size of the raw material testing (length, width, thickness and steel pipe unevenness).
6, into the factory after the steel pipe and steel plate, should be ultrasonic re-examination,grade I is qualified.
7, physical and chemical testing,into the plant of steel and steel according to the furnace batch number,specifications pumping chemical element analysis,mechanical properties, hardness test, the test results should meet the requirements of raw material standards.
8, after re-inspection according to the factory rules Number Registration.
二.Manufacturing process
① Material selection cutting, elbow to select the appropriate steel or steel pipe,with a template scribing with oxygen alkyne flame or sawing machine cutting,and the raw material furnace, batch number and pipe specifications, Project Name, Number identification clearly.
② The steel plate rolling, welding.
③ With a crane to the desired mandrel into the push machine, the blank is further cleaned, the inner wall coated with graphite, and then mounted on the push rod (according to the length of the blank can be installed more than one time), the mandrel with flapper locking, preheating the inner mold to the appropriate temperature push system (heating temperature and propulsion speed should be the best fit).
④ Adjust the intermediate frequency heating coil, the tube is heated to the required temperature, control the propulsion speed.
Buckle buckle Bend, The Shape of the elbow with a suitable tire in the hydraulic machine to correct the radius of curvature.
⑥ To the end, according to the specifications of the elbow with the appropriate tire alignment on the beveling machine, and then the cutting gun is fixed, cut off the excess blank, and leave processing margin to the car.
⑦Integer, with a special tire clamping elbow, with a support head on the press port integer.
4.Heat treatment: according to the heat treatment process, the elbow into the furnace heat treatment.
5.Surface treatment: pipe fittings after heat treatment with sandblasting machine to remove the surface scale.
6.After the surface treatment of the elbow Weld 100% ray detection,Grade II qualified.
7.Mechanical properties testing: according to the relevant standards, the mechanical properties of the elbow test, to ensure that the mechanical properties of the elbow standards, testing items and sampling orientation should meet the requirements of the relevant standards.
8.End processing: according to the design to confirm the drawings for mechanical end face processing Bevel.Within the range of 50mm from the end of the tube, inside and outside the Weld more than high angle grinder grinding.
9.Appearance detection
① Elbow shall not have cracks and other phenomena, the surface should be no hard points.
② Any defects on the elbow tube body is not allowed to be repaired by welding.
10.Size testing: by the company's relevant testing personnel, according to the drawings and pipe fittings related standards for size testing, and to meet the tolerance requirements.
11.Surface treatment: elbow inside and outside the surface should be smooth, no damaging strength and appearance defects,such as scarring, scratches, heavy skin, etc., found defects should be grinding treatment, grinding at the thinning amount is not less than 93.5% of the original wall thickness, grinding should be smooth and with a colorant or magnetic powder flaw detection to confirm the defect removal so far.
12.Nondestructive testing of elbows
After the elbow heat treatment, the company holds the relevant qualification certificate personnel,according to the standard requirements of the elbow magnetic powder, ultrasonic, test results reached Level I qualified.
13.Logo
Mark with a template airbrush or low stress stamp, the outer wall in order to clearly indicate the content of the standard requirements.
14.Stacking and transportation of elbows
Elbow during transport during transport can not be in contact with any part of the car, to avoid bumps.
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45° Elbow
- TEL- +86-15226756063
- EMAIL- czlsg@163.com
- ADD- Yanta Road Industrial Area, Yanshan,Hebei.
